CN216964632U

CN216964632U - High-efficient esterification reaction device

Info

Publication number: CN216964632U
Application number: CN202220156200.6U
Authority: CN
Inventors: 苏永胜; 孔莎莎; 杜青慧
Original assignee: Wilmar Highpolymer Material Lianyungang Co Ltd
Current assignee: Wilmar Highpolymer Material Lianyungang Co Ltd
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2022-07-15
Anticipated expiration: 2032-01-20

Abstract

The utility model relates to a high-efficiency esterification reaction device which comprises a reactor, a methanol gasification pipe, a methanol gas disperser and a product buffer tank, wherein the reactor and the product buffer tank are connected through a material pipeline, the methanol gasification pipe is arranged in the reactor, the methanol gas disperser is arranged at the bottom end of the methanol gasification pipe, and a filler is arranged in the methanol gasification pipe. Compared with batch stirred tank reactors, the high-efficiency esterification reaction device can continuously and stably operate; the reaction temperature can exceed the boiling point of the low-carbon alcohol, and the reaction conversion rate is improved; the methanol countercurrent multistage reaction has high utilization rate, small using amount and simple process regulation and control; no moving equipment, low energy consumption and simple maintenance.

Description

High-efficient esterification reaction device

Technical Field

The utility model relates to the field of chemical industry, in particular to the field of esterification reaction, and specifically relates to a high-efficiency esterification reaction device.

Background

Esterification is a common chemical reaction in chemical industry, and the reaction is to react carboxylic acid and alcohol as raw materials under heating condition to form product ester, and the byproduct is water. The removal of the water produced by the reaction from the system is effective in promoting the equilibrium of the reaction to the right. The reaction apparatus commonly used in industrial production is a reaction kettle, taking stearic acid and methanol as an example of reaction, the common process is to add stearic acid and excessive methanol into the reaction kettle, heat to reflux, stop the reaction after the reaction reaches equilibrium, and carry out post-treatment. The disadvantage of this process is that (1) is limited by the boiling point of methanol and the reaction temperature cannot be increased. (2) The water generated by the reaction can not be removed from the system, and the reaction is not thorough after the equilibrium is reached; (3) the reaction belongs to batch operation, the operation difficulty is high, and the stability is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide the efficient esterification reaction device which has the advantages of high stability, simple and convenient operation and high reaction efficiency.

In order to achieve the above object, the efficient esterification apparatus of the present invention comprises:

this high-efficient esterification reaction device, its key feature is, the device include reactor, methyl alcohol gasification pipe, methyl alcohol gas disperser, product buffer tank, reactor and product buffer tank pass through the material pipeline and link to each other, methyl alcohol gasification pipe arrange the reactor inside in, methyl alcohol gas disperser install the bottom at methyl alcohol gasification pipe, methyl alcohol gasification inside have filler.

Preferably, the device further comprises a jacket, the jacket is sleeved outside the reactor, and the device heats the reactor to the reaction temperature through the heating medium of the jacket.

Preferably, the apparatus further comprises a heating medium inlet and a heating medium outlet connected to both sides of the reactor, respectively.

Preferably, the device also comprises a fatty acid feeding line and a tail gas discharging line, wherein the fatty acid feeding line and the tail gas discharging line are both connected to the reactor, the device continuously feeds the fatty acid mixed with the catalyst to be esterified into the reactor through the fatty acid feeding line, and the tail gas discharging line discharges water generated along with excessive methanol and reaction.

Preferably, the device also comprises a methanol feeding pipeline, one end of the methanol feeding pipeline is connected with the methanol gasification pipe, and the methanol is continuously fed into the methanol gasification pipe filled with the filler through the methanol feeding pipeline.

Preferably, the device further comprises a product discharge pipeline connected with the product buffer tank.

Preferably, the methanol gas disperser is trumpet-shaped, and a plurality of air holes are arranged on the lower end surface.

Preferably, the reactor has a height to diameter ratio of 1 to 50: 1, preferably 1 to 30: 1, most preferably 2 to 5: 1, the ratio of the length of the methanol gasification pipe to the height of the reactor is 0.7: 1-0.99: 1.

compared with batch stirred tank reactors, the efficient esterification reaction device can continuously and stably operate; the reaction temperature can exceed the boiling point of the low-carbon alcohol, and the reaction conversion rate is improved; a multistage reactor can be arranged, so that methanol can perform countercurrent multistage reaction, the utilization rate is high, the using amount is small, and the process regulation is simple; no moving equipment, low energy consumption and simple maintenance.

Drawings

FIG. 1 is a schematic structural diagram of a high-efficiency esterification apparatus according to the present invention.

Reference numerals:

1 reactor

2 Jacket

3 methanol gasification pipe

4 methanol gas disperser

5 heat medium inlet

6 heat medium outlet

7 fatty acid feed line

8 methanol feed line

9 tail gas discharge pipeline

10 material pipeline

11 product buffer tank

12 product discharge line

Detailed Description

In order to more clearly describe the technical contents of the present invention, the following further description is given in conjunction with specific embodiments.

The efficient esterification reaction device comprises a reactor, a methanol gasification pipe, a methanol gas disperser and a product buffer tank, wherein the reactor and the product buffer tank are connected through a material pipeline, the methanol gasification pipe is arranged in the reactor, the methanol gas disperser is arranged at the bottom end of the methanol gasification pipe, and a filler is arranged in the methanol gasification pipe.

As a preferred embodiment of the utility model, the device also comprises a methanol feeding pipeline, one end of the methanol feeding pipeline is connected with the methanol gasification pipe, and the methanol is continuously fed into the methanol gasification pipe filled with the filler through the methanol feeding pipeline.

As a preferred embodiment of the utility model, the device also comprises a product discharge pipeline which is connected with the product buffer tank.

In a preferred embodiment of the present invention, the methanol gas disperser has a trumpet shape, and a plurality of pores are provided on a lower end surface thereof.

As a preferred embodiment of the present invention, the reactor has a height to diameter ratio of 1 to 50: 1, preferably 1 to 30: 1, most preferably 2 to 5: 1, the ratio of the length of the methanol gasification pipe to the height of the reactor is 0.7: 1-0.99: 1.

the utility model relates to a high-efficiency esterification reaction device, in particular to an esterification reaction device for low-carbon alcohol.

The esterification device of the activated carbon consists of the following unit parts, a reactor 1 with a jacket, a methanol feed line 8 with a filler and a distributor, a product buffer tank 11 with a balance overflow function and a related material line 10.

The fatty acid mixed with the catalyst to be esterified is continuously fed into the reactor 1 from a fatty acid feeding pipeline 7, is heated to the reaction temperature through a heating medium of a jacket, the liquid level of the fatty acid is the same as that in the buffer tank 11, and automatically overflows out of the reaction system when the liquid level reaches the liquid level of a product discharging pipeline 12;

as shown in fig. 1, methanol continuously enters a methanol gasification pipe 3 filled with filler from a methanol feed line 8, gas of the methanol heated by fatty acid is distributed by a methanol gas disperser 4 positioned at the lower part of the reactor after being discharged and then reacts with the fatty acid, and the generated water is discharged from a tail gas discharge line 9 along with excessive methanol; wherein, the methanol gas disperser is trumpet-shaped, and a plurality of air holes are arranged on the lower end surface. Because the methanol pipeline is provided with the filler, the methanol can slowly fall and is gasified into gas in the falling process. Because the gasification pipe can form positive pressure due to the gasification of the methanol, the fatty acid can not enter the pipeline under normal conditions, and the fatty acid can be ejected out of the pipeline by the pressure even if entering the pipeline.

(1) The progress and yield of the reaction can be regulated by the feed rate of fatty acid and methanol;

(2) in order to obtain better reaction effect, more than 1 reactor can be used in series.

According to the structure diagram, the equipment is processed by adopting a glass material in laboratory verification. The diameter of the reactor 1 is 50mm, the height is 1250mm, the jacket adopts heat conducting oil for heating, 5 is a heat conducting oil inlet, and 6 is a heat conducting oil outlet. The diameter of the methanol gasification tube is 6mm, and a glass spring is added as a filler to prevent liquid methanol from directly falling to the lower end of the gasification tube; the distance from the outlet at the lower end of the gasification pipe to the bottom of the reactor 1 is 150 mm. The buffer tank adopts a structure that the diameter with an overflow port is 30mm, and the distance from the overflow port to the upper end is 100 mm. Oleic acid is adopted as fatty acid, and p-toluenesulfonic acid with the mass ratio of 1% is mixed as a catalyst; the lower alcohol is methanol. The glass spring is an embodiment of the filler used in the scheme, and the effect is realized by selecting the industrial common filler in an industrial device, wherein the industrial common filler comprises regular filler, pall ring filler and the like, and the material of the industrial common filler comprises ceramics, metals, plastics and the like.

The examples of the utility model are as follows:

in the specific embodiment of utility model, mix oleic acid of catalyst and add reactor 1 and product buffer tank 11 through the peristaltic pump in, press from both sides the conduction oil heating to 120 ℃ in the cover 2. When the liquid level reaches the product discharge pipeline 12, the methanol continuously enters the reactor from the pipeline 8 through the peristaltic pump, is heated and gasified through the methanol gasification pipe 3, and then enters the fatty acid through the methanol gas disperser 4 for reaction. The acid value of the detection product is sampled from the overflow pipe 12 every 0.5 hours, and the system enters a stable operation state when the difference of the two detection data is less than 2%. The conversion of the reaction is achieved by adjusting the feed rates of the fatty acids and methanol. After the system runs stably, the feeding speed of the fatty acid is 500g/h, the feeding speed of the methanol is 300g/h, the acid value of a 12-tube sampling test product is 0.5mgKOH/g, and the conversion rate of the fatty acid is 99.7 percent.

The prior art comparative examples of the utility model are as follows:

the reaction was stirred by using a batch of the same treatment amount as in example, and 500g of oleic acid mixed with 1% p-toluenesulfonic acid and 300g of methanol were added to a 2000mL three-necked flask, stirred, heated to reflux and reacted for 4 hours. The acid value of the product is 8mgKOH/g by sampling detection, and the conversion rate of the fatty acid is 96 percent.

In this specification, the utility model has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the utility model. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.

Claims

1. The utility model provides a high-efficient esterification reaction device, its characterized in that, the device include reactor, methyl alcohol gasification pipe, methyl alcohol gas deconcentrator, product buffer tank, reactor and product buffer tank pass through the material pipeline and link to each other, methyl alcohol gasification pipe arrange the reactor inside in, methyl alcohol gas deconcentrator install the bottom at methyl alcohol gasification pipe, methyl alcohol gasification pipe inside have a filler.

2. The efficient esterification reactor apparatus according to claim 1, further comprising a jacket, wherein the jacket is disposed outside the reactor, and the apparatus heats the reactor to a reaction temperature by a heating medium of the jacket.

3. The efficient esterification reaction apparatus according to claim 1, wherein the apparatus further comprises a heating medium inlet and a heating medium outlet connected to both sides of the reactor, respectively.

4. The efficient esterification apparatus as claimed in claim 1, further comprising a fatty acid feed line and a tail gas discharge line, both connected to the reactor, wherein the apparatus continuously feeds the fatty acid mixed with the catalyst to be esterified into the reactor through the fatty acid feed line, and the tail gas discharge line discharges water produced by the reaction together with excess methanol.

5. The efficient esterification reaction apparatus according to claim 1, further comprising a methanol feed line having one end connected to the methanol vaporizing tube, wherein methanol is continuously fed into the methanol vaporizing tube filled with the packing through the methanol feed line.

6. The efficient esterification reaction apparatus according to claim 1, further comprising a product discharge line connected to said product surge tank.

7. The efficient esterification reaction device according to claim 1, wherein the methanol gas disperser is trumpet-shaped, and a plurality of air holes are arranged on the lower end surface.

8. The efficient esterification reactor according to claim 1, wherein the reactor has a height to diameter ratio of 1 to 50: 1, the ratio of the length of the methanol gasification pipe to the height of the reactor is 0.7: 1-0.99: 1.

9. the efficient esterification reactor according to claim 1, wherein the reactor has a height to diameter ratio of 1 to 30: 1.

10. the efficient esterification reactor according to claim 1, wherein the reactor has a height to diameter ratio of 2 to 5: 1.